With the Greatest Rivalry series looming, Erasmus is running a deliberate two-track operation. Roughly 26-27 players will travel to Argentina for the August 8 Test — including Eben Etzebeth, Siya Kolisi, Lood de Jager and Franco Mostert — while 15-17 players stay home to begin acclimatising ahead of the All Blacks series opener on August 22. The logic is straightforward: New Zealand will be sharpening up against the Stormers, Sharks and Bulls before that first Test, and Erasmus doesn't want his squad flying back from Buenos Aires at a disadvantage. Pieter-Steph du Toit is specifically earmarked to skip Argentina and bank a two-week rest instead, while Sacha Feinberg-Mngomezulu could be released to the Stormers for game time on a case-by-case basis. Four debutants — Vusi Moyo, Jaco Williams, Ruben van Heerden and Carlu Sadie — feature against Wales this weekend before the squad splits.